Violent clashes broke out outside two military barracks in the Mexican state of Guerrero where 43 students disappeared in September last year. Student-led demonstrators clashed with military and police in Iguala as well as in Acapulco.

Military police officers are seen amid smoke during a demonstration by activists and relatives of the 43 missing trainee teachers from Ayotzinapa's teacher training college, at the military zone of the 27th infantry battalion in Iguala, Guerrero State(Jorge Dan Lopez/Reuters)

In Iguala, demonstrators stormed the barracks and rammed a gate with a truck to gain access to the military facility. Protesters hurled rocks and beer bottles at soldiers who responded by firing tear gas.

The demonstrators said they believed the military was involved in the disappearance and apparent massacre of 43 trainee teachers.

Activists use a lorry to gain access to the military zone of the 27th infantry battalion in IgualaJorge Dan Lopez/ReutersActivists take beer bottles from a lorryJorge Dan Lopez/ReutersAn activist prepares to throws a beer bottle at military police officers in IgualaJorge Dan Lopez/ReutersAn activist holds a brick during clashes with military police officers in IgualaJorge Dan Lopez/ReutersAn activist kicks the shields of military police officers during a demonstration in the military zone of the 27th infantry battalion in IgualaJorge Dan Lopez/ReutersA man brandishes a large blade at the naval base in Acapulco, Guerrero StatePedro Pardo/AFPA woman holds a placard reading "Ayotzinapa: everything points to the military"Pedro Pardo/AFP

The fate of the 43 students has rocked the government, which says they were abducted by corrupt police in the southwestern city on the night of 26 September, then probably incinerated by members of local drug gang Guerreros Unidos.

The remains of only one of the 43 students has been identified so far, and the government blames former Iguala mayor Jose Luis Abarca and his wife Maria de los Angeles Pineda for masterminding their disappearance with the gang.

Federal courts announced Pineda will be tried for engaging in organised crime. The courts authority said it believed Pineda had been working with Guerreros Unidos since at least 2005, and accused her of engaging in crimes against health, which includes drug trafficking, and managing illicit funds.

Between 2009 and 2014, she took deposits probably originating with the drug gang worth about 13.7 million pesos (£618,961) in four bank accounts, the court said.

Pineda and Abarca fled Iguala a few days after the abduction of the students, and were captured in November by police.

Maria de los Angeles Pineda Villa, the wife of former mayor of Iguala, Jose Luis Abarca, is transferred to a prison in Tepic, Nayarit state(Mexico's Attorney General's Office/Reuters)

Students in Chilpancingo, near the coastal city of Acapulco, also led a demonstration at a Navy barracks.

The leader of Acapulco's State Coordinator of the Teachers of Guerrero (CETEG), Walter Emanuel Anorve, said they believe members of the military were involved in the disappearances.

A truck is damaged during a protest outside a military outpost in ChilpancingoJesus Guerrero/AFPA truck burns outside a military installation in Chilpancingo, Guerrero StateJesus Guerrero/AFP

President Enrique Pena Nieto is facing his deepest crisis over the government's handling of the investigation.